Hi Peter, DB2OS
I was reading the document in particular point 2.2.2 Communication and 2.2.3 but in my opinion the Radio Hams are off side because everyting has been already designed and in my opinion there is no room available on the Lander for a Moon-Earth experimental communication transponder in our L band and S band because our antennas are too big.
Since the main 7.2 and 8.5 GHz X band High Gain Antennas of the Lander are oriented toward the Earth in a fixed position to compensate the pointing for libration probably only a 5 watt pep and a circularly polarized horn on our 10.5 GHz should be possible.
73" de
i8CVS Domenico
----- Original Message ----- From: "Peter Guelzow" peter.guelzow@kourou.de To: amsat-bb@amsat.org Sent: Sunday, June 03, 2012 12:57 AM Subject: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Hi together,
Please also have a look at this document:
http://wsn.spaceflight.esa.int/docs/lunarlander/LunarLander_EIDA_CDI_230512. pdf
in particular see point 2.2.2 Communication and 2.2.3:
"Visibility of the Earth from the landing site imposes the following constraint: • communications shall only be possible within a 13.7 day (TBC) window each month, and shall depend on the availability of the ground station."
further:
"the mean power available for an individual payload is expected not to exceed 20W"
73s Peter DB2OS
On 03.06.2012 00:29, Peter Guelzow wrote:
Check also this discussion from James Miller, G3RUH:
http://www.amsat.org/amsat/articles/g3ruh/110.html73s Peter, DB2OS